Messages in this thread | | | From | Leon Romanovsky <> | Subject | [PATCH -rc 0/4] Protect from GCC garbage input in GCOV | Date | Wed, 2 Sep 2020 11:55:09 +0300 |
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From: Leon Romanovsky <leonro@nvidia.com>
Hi Linus,
Both Colin in Ubuntu [1] and I in FC 32 are having same kernel crashes while GCOV is enabled. The reason to it that n_fuction variable that should be provided by GCC is not initialized (or wrongly set).
This patch is based on the RFC [2] which I sent to gather feedback, but didn't get any response, so sending it to you in proper -rc format.
Bottom line, GCOV is broken on GCC 10.2.
Thanks
[1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1891288 [2] https://lore.kernel.org/lkml/20200827133932.3338519-1-leon@kernel.org
Leon Romanovsky (4): gcov: Open-code kmemdup() to work correctly with kernel and user space pointers gcov: Use proper duplication routine for const pointer gcov: Protect from uninitialized number of functions provided by GCC 10.2 gcov: Don't print out-of-memory print for all failed files
kernel/gcov/fs.c | 5 +++-- kernel/gcov/gcc_4_7.c | 17 +++++++++-------- 2 files changed, 12 insertions(+), 10 deletions(-)
-- 2.26.2
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